US2266770A - Self-loading truck - Google Patents

Description

12 Sheets-Sheet 2 L. G. KURTZ ET AL SELF-LOADING TRUCK Filed Jul'y 51, 1937 llll'l Dec. 23, 1941.

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Dec. 23, 1941. L.. G. KURTZ ETAI.

SELF-LOADING TRUCK Filed Juiy 51, `195'( 12 sheep-sheet 1 .M M m, Ud

Dec. 23, 1941. L.. G. KURTZ ETAL 2,266,770

' SELF-LOADING TRUCK Filed July 51,l 1957 12 sheets-sheet s Dec. 23, 1941. l.. G. KURTZ ET l.

SELF-LOADING TRUCK Filed July 31, 1937 12 sheets-sheet 4 Dec. 23,1941. 1 G. KURTZ ET AL SELF-LOADING TRUCK Filed July 31, 1937 12 Sheets-Sheet 5 www,

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Dec. 23, 1941. L. G. KURTZ ETAL SELF-LOADING TRUCK 12 sheets-'sheet e Filed July 5l, 1937 Gum/ww Dec. 23, 1941. 1 G. KURTZ ET Al.

' SELF-LOADING TRUCK Filed July .31, 1937 l2 SheetS--SheerI 7 Chf/O. Oibsah! Dec.'23, 1941. L .'G. KURTZ ET Al.` v '2,266,770

SELF-LOADING TRUCK Filed July 51, 1937 vl2 Sheets-Sheet vDecQZI, 17941. 1*.. G. KURTZ ETAL SELF-LOADING TRUCK Filed July 51, 19.37 l2 Sheets-Sheet 9 gw. o m/ Dec. 23, 1941'. L. G. KURTZ l-:T A1.

SELF-LOADING TRUCK Filed July 51, 1957 12 Sheets-Sheet 10 'De'.23, 1941. Lamm ETAL 2,266,770

SELF-LOADING TRUCK Filed July 51., 1957 12 sheets-sheet 11 .1&9

D ec. 23, 1941. L. G. KURTZ' ETAL ,2,266,770

` SELF-LOADING TRUCK Filed July 31, 1957 12 sheets-sheet 1 '2 Patented Dec. 23, 1941 UNITED STATES.

PATEN'L oFFlcE SELF-LOADIN G TRUCK Loron G. Kurtz, Brooklyn, and Carl C. Ottoson, Port Richmond, Staten Island, N. Y.

Application July 31, 1937, Serial No. 156,782

25 Claims.

rear end of the conveyor and carried by it up and into the truck body. l

The collection or dump body is preferably closed,.for preventing the spread of dust and odors, thus providing a sanitary assembly. The

horizontal portion of the conveyor extends into the upper part of the dump body and well toward the front thereof and serves to distribute the material evenly throughout the body and also to crush and compress the load into smaller volume.

The truck body is dumped by raising the front end thereof. Preferably, prior to dumping, the rear part of the conveyor is raised out of the way.

The principal objects of the invention are:

A. To provide, in a dump truck having a dump body and an endless conveyor having a downwardly extending portion at the rear, power operated means for raising and lowering `the body for dumping and power operated means for raising and lowering the rear part of the conveyor, all in combination with Acontrol means which operates sequentially, whereby the rear part of the conveyor must be raisedpartially or completely before the body is raised for dumping.

B. To provide, in a dump truck having a dump substantially normal position before the rear part of the conveyor is lowered to the normal position. `However, these lowering operations could take place simultaneously, rather than sequentially,if desired.

C. To provide, in a. truck having an endlessv conveyor, improved mounting and driving means for the conveyor.

D. To provide, in a. dump truck provided with an endless conveyor, improved resilient mountden shocks that might be impressed on the conveyor and for compensating for possible slight variations in length of the conveyor incident to the raising and lowering of the rear part thereof.

s E. To provide, in a dumptruck provided with power operated means for raising and lowering the body and for raising and lowering a part of the endless' conveyor, improved power take-oil and power transmission means, for transmitting l power to the endless conveyor when it is in normal loading position, and 'for disconnecting this power transmission preparatory to dumping.

F. To provide, in a dump truck provided with an endless `conveyor at the rear, power operated l means under the control of the operator for raising and lowering that portion of the conveyor at the rear end of the truck.

G. To provide, in a dump-truck provided with a conveyor having a downwardly extending portion at the rear, hydraulic means for raising and lowering this downwardly extending portion, including means, preferably a metered relief outlet valve, for cushioning and retarding the lowering of this portion of the conveyor, and tail gate, to normal position, without the usual jar.

3U such openings. The current of air from such fan would, of course, be screened or ltered.

The invention also comprises, in addition to the foregoing, further improved features of con struction and operation, which will be described :lo .in connection with the accompanying drawings,

illustrating in some detail the present preferred embodiment of the invention.

In the drawings: l

Figure 1 is a side view, partly in section, of the improved refuse collecting truck forming the subject matter of this invention;

Figure 2 is a plan view of the same;

Figure 3 is an end view;

Figure 4 is a side view of a portion of the truck showing a portion of the power transmitting unit for transmitting power to the conveyor on the truck body; 1

Figure 5 is an enlarged side View of a power 50 transmitting assembly for delivering power to the truck body for` operating the conveyor;

Figure 6 is a plan view of the same; Figure 7 is an end view ofv Figure 6; Figure 8 is a vertical sectionalview. of the powlng means for the conveyor, for absorbing suder transmission Clutch;

' for lowering the body;

Figure 9 is a section on the line 9-8 of Fig. 8, looking in the direction of the arrows;

Figure 10 is a sectional view on the line I8-I8 of Fig, 8, looking in the direction of the arrows;

'Figure l1 is an enlarged detail view of a portion of Fig. 8: i

Figure 12 is an enlarged plan view, partly in section, of the forward end of the conveyor;

Figure 13 is a side view of the same;.

Figure 14 is a section on the line I4-I4 of Fig. 12;

Figure 15 is a fragmentary section on the line I5-I5 of Fig. 14;

Fig. 16 is an enlarged sectional view of the control valve and associated parts for controlling the operation of raising and lowering the conveyor and tail gate. and the body, the valve being in neutralposition:

Figure 17 shows the control valve in the position for raising the conveyor and tail gate;

Figure 18 shows the control valve in position for raising the body;

Figure 19 shows the control valve in position Figure 20 shows the control valve, in position for lowering the conveyor and tail gate;

Figure 21 is a sectional view through the control valve taken at right angles to the views just described;

Figure 22 is an enlarged sectionalvlew of the metered relief outlet valve for retarding the lowering of the tail gate;

Figure 23 is a section on the line 23-28 of Fig. 22; and

Figure 24 is a diagrammatic view of the control valve and its connections to the parts controlled thereby.

Figure 24A is a vertical sectional viewof a modified form of drive for the conveyor;

Figure 25 is a section on the iine 25--25 of Fig. 24A;

Figure 26 is a plan view of the modified conveyor drive of Fig. 24A;

Figure 27 is an enlarged view, partly in verticonveyor housing I2, the back or right-hand portion of which forms or carries the tail gate for closing the body I, is pivoted at its upper portion to the upper rear end of the truck body on the axis I8, a sliding, substantially dust-proof hood, with which the upper end of the housing I2 telescopes, being shown at I4.

The lo'wer end of the housing I2 is provided with a boot I8. pivoted to swing up and down 10 on the pivot I6, springs I1, engaging respectively with the housing and with the boot, being provided as an aid in opening and closing thel boot.

The upper part of the boot is open, as at lia,

to feed material to the conveyor, the opening being bordered by a funnel ange lib.

To describe further the mounting for the forward end of the conveyor, the sprockets 8 and 8 are carried by a drive shaft I8 mounted in suitable bearings-I8. Shaft I8 is coupled to shaft' 20 2l, which is preferably the axle of a conventional worm gear mounted in gear casing 2|, the worm of which isdriven by a shaft 22, having a squared end, to which is attached a universal joint 22a, which is coupled to drive shaft 88a.

The resilient mounting for the forward end of the conveyor will now be described. The bearings for the drive shaft I8 are mounted in suit- I able housings on movable side plates 28. The plates 28 are provided with guide slots 24 through which pass retaining bolts or guides 25, held in place by plates 28, the bolts having shoulders thereon on which the plates 28 rest, to provide a clearance so that the plates may slide back and forth in a horizontal direction. The described gear box 2I and associated parts are carried by and also move back and forth with the plates 28. The plates 28 are provided, at their inner ends, with flanges 21 against which bear strong compression springs 28 coiled around a 40 threaded shaft 28 which passes through a stud member 8l, suitable nuts 8| and 32 being provided for controlling the positioning of the shaft 28 and the degree of compression on the springs, as will be readily understood, for controlling the cal section, of details of the modiiied conveyor 45 force exerted by the Springs on the plates 2l ed on the automotive chassis 2, being pivoted thereto on the pivot`8, for rearward dumping, the raising of the body for dumping being -preferably accomplished by a known type of hydraulic jack 4 carried by the chassis and connected to the body I at 8. Any other suitable type of body raising and lowering device could be used.

The body I is substantially completely enclosed for .preventing the lescape ot dust and odors. An'endless conveyor indicated generally at 8 and provided with blades or flights 1 engages with and is driven by power driven sprockets 8 and 8, Fig.-l2, located at the forward end of the conveyor, this forward end, as indicated in Figure 1. being inside the upper part of, and well toward the front of thebody I. The lower stretch of Lthe conveyor moves to the right, as shown by the varrows in Fig. 1. The conveyor passes around sprockets I 8 carried at the upper rear vpart of the body I and thensdownwardly and rearwardly to and around the sprockets II,

conveyor housing I2. The'sprockets I8 could be omitted and'guide rails used'instead. This 'l5 the vertical shaft 41. The upper end of shaft From the described construction it will be evident that the forward end of the conveyor can move longitudinally in the slots 24 againstthe tension of the springs 28, thereby cushioning the con- 50 veyor against sudden shocks and compensating for any slight variations in length of the conveyor as it is raised and lowered. f

The drive shaft I8 is provided with a guard 88 supported on rearwardly extending arms 84, provided with slots engaging over the xed studs 88, the arms 84 being thereby enabledto slide back and forth with the sprockets and drive shaft.

This guard andarms are -for preventingpieces of rags, rope, etc., from wrapping around the rotating drive shaft I8.

The conveyor 8 isprovided wherever necessary with supporting guideways 81.

The power take-off for taking power from -the engine ofthe vehicleand transmitting it to the driveshaft I8 of the conveyor will now be described, reference being made particularly to Figures 4, 5, 6, 7 and 8. 'I'he housing 88 contains gears, shafts, etc.,I driven from the engieof the vehicle. Power from the housing 88 is carried into a gear shift housing 88 and delivered to a lower-'drive shaft 4I, which in'turn drives sprocket 42 that drives the chain 48, which ii;

through suitable gears in the housing ,drives 'The truck body is provided with a shaft 49, the 'lower end of which is provided with a clutch face 48' for cooperative engagement with the clutch face 48. In order to facilitate this engagement, and keeping in mind that the shaft 49 is raised `and lowered with the body of the truck, the lower part of shaft 49 is provided with a slidable guide collar 68, chamfered at I, for guiding the clutch faces into engagement, collar 50 being resiliently vided a self-aligning bearing 53, which bearing 4 -is mounted in a collar 54 supported by a complemental collar 55, these collars having a slight lateral movement, the clearance for which is shown at 56, see Fig. 8. Mounted within the clearance 56 is a sinuous spring 51 which allows the collars 54 and 56 to move laterally, but tends to bring them back to the central position. In order to prevent grit, etc., from the truck body from reaching the bearings, upper and lower washers 58 and 58 of rubber or the like, may be provided, held in place by retaining elements 59. From the described construction it will be seen that as the truck body is raised, the clutch faces 48 and 48' automatically disconnect themselves The metered relief valve 61. shown in Fig. 22, is provided with a spring-pressed ball 18, which allows free flow of oil to the :lacks 63 for raising them. The reverse flow of oil, however, is much slower, taking place only through the small, metered by-pass 1I, whereby the oil pressure is relieved only gradually, resulting in aA gradual lowering of the housing I2 and the tailgate.

The control valve housing, see Figs. 16-21, and Fig. 24, indicated generally at 69, has an outlet 68 connected to pipe 66 for the jacks 63. -The valve housing also has an outlet 12 connected by a pipe 18 to an oil tank 14. The valvev housing is also provided with an outlet 15 connected by a pipe 16 to the suction side of the pump 11. The valve housing is connected to the pressure side of the pump by a pipe 18, threaded into the nipple 'I8a,. this nipple being provided with a one-way A valve formed by the ball 18 and spring 19.

and as the truck body is lowered, the collar 5I) takes over the clutch face 48, being guided to position by the collar 58, the self-aligning bearing 53 and its mounting allowing the shaft 49 to move slightlyfrom the vertical to compensate for the slight arcuate movement of shaft 49.

The shaft 49, as shown more particularly in Fig. 1, passes into a gear box 60 and through suitable gears drives the shaft 68a, which is coupled, slidably, with the drive 22, Fig. 13, of the worm gear in casing 2l, which worm gear, as has been described, drives the drive shaft I8 for the conveyor. The ratio of the sprockets, worm and other gears used should be arranged tn give the conveyor a speed of about 60 feet a minute, with an engine Speed of 450 R. P. M.

- In practice, it is desirable 'to first raise the tail gate, and then to raise the body. However, these operations may be reversed, if desired, and

provided the tail gate has suillcient clearance to clear the ground even if the body is raised first.

For this purpose, of raising the tail gate, hydraulic jacks .63 are provided, these jacks being pivotally secured, at their right-hand ends, to pivots 64, the piston or power members of the jacks being connected to power arms 65, which y in turn are connected at their outer ends to valve 61. The pipe 66 is connected with` a controlv valve housing, to be described later. Evidently, as pressure is applied to the pipe 66, the jacks 68 will be operated to raise the conveyor housing I2 and the tail gate carried thereby, and as the The control valve housing 69 is also provided with an outlet 88, which is connected by a pipe 6I to the jacks 4 for raising and lowering the body. The several described inlets and outlets all communicate with the circular, cylindrical valve chamber 82, in which is rotatably mounted the valve body 88, of the shape shown, the valve body being provided with a central passageway 84. The valve body 88 is secured to an operating shaft 86, which is controlled by an operating arm 86.

In order to relieve excess pressure, at the end of the upstroke a by-pass, comprising passages 81, 88 and 89, see Fig. 21, is provided, controlledby a spring-pressed, relief valve 98, which relieves excess pressure of oil and by-passes it back to the pump.' This is to relieve pressure when the tail gate and truck body reach their up position, thus avoiding over loading the hydraulic pumps and the pressure lines.

'Ihe valve 88 is controlled by an operating rod 9|,.'connected-to the operating arm 86, the operating rod 9| being controlled by a control handle 92, which is advanced step by step on the rack 92', so as to assume the following sequential positions:

1. First 'or neutral position, shown in Fig. 16. Inthis position. oil isqsimply circulating from the' pump to the valve and back to the pump. 'I'he handle 92 is now in the "first notch a of the rack 82'.

2. Second or conveyor and tail gate lraising position, shown in Fig. 17, in which oil'under pressure passes into passage 68 and pipe. 66, to the jacks 68 for .raising the conveyorv and tail gate. The handle 82 is placed in the second notch b of the rack for this operation.v

3. Third or body-raising position, 'shown in F18. 18, in which the oil under pressure is held in the tail gate raising jacks 6 8 and oil under pressure is appliedA to the jacks 4 through pipe 8l for raising the body. 'Ihe handle 92 is placed in the third notchv c of the rack for this operation. When these two operations have been i completed, the tail gate and conveyor are raised pressure is relieved, through the metered relief valve 61, these parts will be lowered gradually.

and the'body has been raised and dumped.

- 4. Fourth position, shown in Fig. 19, where pressure is being relieved from the body raising jacks 4 and passed back through the passage 84 in the valve and outlet 12 to the tankf," therebyy through the metered relief valve i1, whereby the lowering of the tail gate is gradual. 'I'he handle92isplacedintheiifthnotcl13ofthe rack for this operation.

The foregoing operations are sequential. Af-

ter the sequence of operations has been completed, the control handle 92 is returned to its -original position, which restores the valve to the position shown in Fig. 16.

If it -is desired to lower the body and the tail gate simultaneously, the operator will move the manual control lever from the notch c on the rack to notch e, skipping notch d, thus moving the control valve fxom the position shown in Fig. 18 directly to the position shown in Fig. 20. By so doing, it is evident that the oil pressure would be relieved simultaneously from the body raising jacks and from the tail gate jacks, with the result that both the body and the tail gate would be lowered simultaneously. However, due to the presence of the metered relief valve in the oilline from the tail gate jacks, it is evident that the tail gate would be lowered more slowly than the body.

The pump 11 for supplying oil under pressure is driven by a shaft 94, the shaft 94 in turn driven by a. shaft 95, shaft 95 being connected to the upper part of the gear shift 39. The gear f pump. Inasmuch as when the conveyor is being operated there is no need for oil pressure for operating the lifting jacks and, conversely, when the lifting jacksI are being operated, the conveyor is not in operation, the gears in the gear shift 39 are arranged to drive either the lower shaft 4| or the upper shaft 95, but not to drive them both at lthe same time. The'gear shift may, of course, also assume a. neutral or inoperative position. A control lever 96 pivoted on theaxis 96' for shifting the gears is provided, this lever being connected by a rod 91 to the manual control handle 83, which may be providedwith the usual rack for holding it in any v.given set position.

The exhaust fan for creating a slight suction within thebody I forcausinginwardilowof air through crevices for prevelaiting the escape of dust will now be Buch an exhaust fan couldbeplacedinvariousposftions. Onepossible arrangement is shown-in Fig. 2, where the exhaust fan Il has its inlet lll in 'eommunica tionwith the interiorofthebody Ltheexhaust |I| of thefandeliveringtoascreenoroutlet box |92 which would filter-out dust before allowing-the air toespe. '111e fan 33 maycon veuienuybedrivenbyaelnmmurmura:

greater clearance space at the discharge end of the conveyor, which facilitates the unloading thereof. Furthermore, any tendency for strings, ropes, rags, etc., to wrap around the drive shaft is 'eliminated by omitting 'the drive shaft.

Referring now to Figures 24 to 28, showing this modified drive, power from the gear housing 3l', corresponding to housing 3l, is transmitted by suitable shafts and gears to the gear shift housing 39', corresponding to the gear shift housing 39, arranged to drive alternately the hoist oil pump or the conveyor, as has been described. Power from the gear shift housing 39 for driving the conveyor is transmitted to the universal joint |05, shaft |91, universal joint |08, and ,to shaft |09, the upper end of which is provided with a clutch element Ill. The clutch ||0 engages with clutch carried by the lower end of the shaft H2, which is rotatably mounted in suitable pillow blocks H3.

It will be understood that the shaft |09 and associated parts are carried by the chassis, and that the shaft ||2 and associated parts are carried by theV truck body as it is lifted for dumping, the break between the two shafts occurring at the clutch faces IIII, III.

The upper end of drive shaft I2 drives the universal joint ||4 which Ais connected to a main drive shaft IIS, which extends upwardly, usually at a slight inclination, to the universal joint H6, connectedv with the' angle gear box'casing ||1, and drives shaft ||9 on which is drive sprocket H9, which drives chain |20. sprockets |2I cooperate with the drive chain, and the chain drives sprockets |22 and |23 mounted respectively on forwardly extending shafts |24 and |25. 'Ihese shafts |24 and |25 drive sleeves |26, Fig. 26, which telescopically engage with shafts |21, the engagement being such that sleeves |26 drive shafts |21, as by making the telescopically engaged parts angular in cross section. Shafts |21, through suitable connections |28, are operatively connected with the gear boxes |29 for worm gears, as by engagement with 22, Fig. 12, the worms of these gears (not shown) driving the usual-worm wheel, each of the worm wheels driving shafts |39 which are providedwith drive frame members |34. The mounting between the slidable plates l'and the xed plates |34 is of .theboltandslottypeasshowninconnection turn, is driven by a sm'oehet'rriedon an ex,

tension |94 oftheshaft Il. Thechaln'l mild be sumciently slackto allow for back' and forth movements of Il, which slack would betakenupby mon-drive shaft. I n the modified drive about tobedesm'lbed,`thedriveshaftiselim inated, and the two sproehetsdrlven separately.

'with the mounting 0f the-sutiable plates 23- in Figure l2 and such illustration is not repeated here. The slidable plat |33 are provided with upturnedilanges Iliagalnstwhich bear-strong .compression vsprings |39, the other 'end of the springs bearingiagalnst plates |31 held in place adiustablybythenuts l3onathreadedshaftA l39,aroundwhichthespring l'iscolled. This' resilient mountimachievesthe same general ef fectas that achievedbythe mountingsshownin Figures 12, 13 and 14. the springs keeping the oonveyorehainstautatall times andtakingup anysuddenshocksthatmaybeimpressedonthe chainaas-bytbehandlingofveryheavymate-- riaLsuchaspavingblochandthe like. 'lheslid- Suitable idler able connection between the drive members |26 and |21 permits the fore and aft sliding move-- ment of the sliding plates |33.

. Also, with this modification, an exhaust fan of the type shown at 99, Figure 2, may be used, power for the fan being tapped off at any convenient point, as by taking it on the right-hand end or' either of shafts |24 or'l25, Figure 26.

To describe further details of .the mounting -for the shafts |09 and ||2 and referring particularly to Figure 27, shaft |09 is mounted in a floating bearing comprising upper and lower collars |4| and |42, these collars being resiliently held at their outer edges by a resilient packing |43 kept in place by a retainer flange |44. The resilient packing |43 lallows. the bearing and the shaft to shift laterally for accurate coupling engagement of the clutch and The upper part of shaft |09, just below the clutch H0, is provided with a centering collar |45.

The upper' shaft ||2 is provided at its lower end with a spring `mounted centering collar |46,

which is provided with a centering ring |41, in-

While the present preferred embodiment of l and shown, but vit may be vcarried out in other ways.

We claim as our invention:

1. In an automotive truck of the characterdescribed, in combination, a truck body, an endless conveyor mounted in the upper part of the truck body and having a pivotally mounted downward extension, means for raising the downward extension, means for raising the truck body, and unitary control means for causing the downward extension to be rst raised and then held stationary as the truck body is raised for'dumping.

2. In an automotive truck of the character described, in combination, 'a truck body, an endless conveyor mounted in the upper part of the truck body and having -a pivotally mounted downward extension, means for resiliently mounting the conveyor, hydraulic means for raising said downward extension, and hydraulic means for raising the truck body, and means for driving the conveyor and for operating both said hydraulic mealns by power derived from the motor of the truc 3. In an automotive truck of the character described, ln combination, a truck body, an endless l conveyor mounted in the upper part of the truck body and having a pivotally mounted downward extension, resilient means cooperating with the conveyor, for keeping it taut and for enabling it to absorb shocks, hydraulic means for raising the downward extension, hydraulic means for raising the truck body. and a common manual control for both said hydraulic means.

4. In an automotive truck of the character described, in combination, a truck body, an endless conveyor resiliently mounted at its forward end mounted in the upper part ofthe truck body and havingv a pivotally mounted downward exf tension. hydraulic means for Vraising said dcwn- 7d dumping.

5. In an automotive truck of the character described, in combination, a truck body, an endless conveyor mountedin the upper part of the truck body and having a pivotally mounted downward extension, hydraulic means for raising said downward extension. hydraulic means for raising the truck body and a common manually operated control means for both said hydraulic means for starting the raising of the downward extension before starting the raising of the body, to' effect consecutive operation of the raising of the downward and rearward extension and the raising of the truck body in the operation of raising the truck body for dumping.

6. In an automotive truck of the character described, in combination, a truck body, an endless conveyor mounted in the upper part of the truck body and having a pivotally mounted downward extension, hydraulic means for raising said downward extension, hydraulic means for raising the truck body and` a common manually operated control means for both said hydraulic means for lowering the downward extension and the body simultaneously or consecutively.

'1. In an automotive truck of the character described, in combination, a truck body, an endless conveyor mounted in the upper part of the truck body and having a pivotally mounted downward extension, hydraulic means for raising said downward extension including as a part thereof means for retarding and cushioning the lowering of said downward extension to its original position, hydraulic means for raising the truck body,'and a common control for both said hydraulic means.

8. In an automotive truck of the character described, in combination, a truck body, an endless conveyor mounted in the upper part of the truck body and having a pivotally moimted downward extensiom means for raising and lowering said extension, means for raising and lowering said body. and means foi-.resiliently mounting one end of the conveyor comprising a transversely extending drive shaft for the conveyor. bearings therefor, slidable plates for supporting said bearings, and resilient mounting means for said slidable plates. Y

9. In an automotive truck of the character described, in combination, a truck body, an endless conveyor mounted in the upper part of the truck body and having a pivotally mounted downward l extension, means for raising and lowering said extension, means for raising and lowering said body and means for resiliently mounting one end of the conveyor comprising a transversely extending drive shaft for the conveyor, a guard around said shaft, bearings for said shaft, slidable plates for supporting said guard and said bearings, and resilient mounting means for said slidable plates.

10. In an automotive truck of the character described, in combination, a truck body. an endless conveyor mounted in the upper part of the truck body and having a pivotally mounted downward extension, means for raising and lowering said extension, means for raising and lowering saidbody, means for resiliently mounting 'one end of the conveyor comprising a transversely extending drive shaft for the conveyor, bearings therefor, slidable plates for supporting said bearings, resilient mounting means for said slidable plates and driving means for said drive shaft, mounted on and movable with one of said side plates;

11. In an automotive truck of the character described, in combination, a truck body, an endless conveyor mountedin the upperpart of the truck body and having a pivotally mounted downward extension, means for raising and lowering said extension, means for raising and lowerl described, in combination, va truck body pivoted ing said body, and means for resiliently mounting one end of the conveyor'comprising a transversely extending drive shaft for the conveyor, a worm gear for driving said drive shaft, bearings for said drive shaft, slidable plates for supporting said worm gear and said bearings, and means for resiliently mounting said slidable plates. i

12. In an automotive truck of the character described, in combination, a truck body, means for raising and lowering said body, an endless conveyor mounted in the upper part of the truck body and having a pivotally mounted downward extension, vmeans for driving the conveyor at its forward end, means for transmitting power to said driving means, `comprising a laterally extending shaft and a cooperating, downwardly extending shaft carried by the truck body, power supplying means on the chassis of the truck, and clutch coupling means, carried respectively by the lower end of said downwarlly extending shaft and by said power supplying means, for supplying power to said shaft, said clutch coupling means automatically disengaging and engaging, respectively, as the truck body is raised and lowered.

13. In an automotive truck of the character described, in.,v combination, a truck body pivoted.

for dumping', a power driven endless conveyor mounted in the upper, rear part of the body and having a pivotally mounted downward extension, hydraulic -means for raising and lowering the body, hydraulic means for raising and lowering the downward extension, means, driven by power derived from the motorlof the truck, for supplying iiuid under pressure for both said hydraulic means and unitary control means for said two hydraulic means for operating said two hydraulic means consecutively.

14. In an automotive truck of the character described, in combination, a truck body pivoted for dumping; a power driven endless conveyor mountedinthe upperpart ofsaidbodyandhaving a pivotally molmted downward extension. hydraulic means forraising and lowering said .downward extension. hydrulic means for raising andlowering said truck body,.a,fluid pump for supplying duid under-pressure for both hydraulicmeans, power take ci! means for supplying power for operating said pump and s common manual control for both said hydraulic meansforinitiatingtheraising ofthedownwardextension'before initiating theraising of the trucs 15. In 'an automotive truck of the' character described, in combustion, a truck body, pivuted fordumplng,apowerdrivenendlessconveyor mountedintheupper'partofsaidbodyandhsving a pivotally mounted downward extension, hydraulic means for raising and lowering said downward extension, hydraulic means for raising for dumping, a power driven endless conveyor mounted in the upper part of said body and having a pivotally 'mounted downward and rearward extension, hydraulic means for raising and lowering said downward extension, hydraulic means for raising and lowering said truck body, a fluid pump for supplying fluid under pressure for both' said hydraulic means, power take off means for supplying power for operating said pump and for operating said endless conveyor and gear shift means cooperating with said power take off means for supplying power alternatively either to the fluid pump or to the endless conveyor.

17. In an automotive truck of the character described, in combination, a truck body pivoted for dumping, a power driven endless conveyor mounted in the upper part of said body and having a pivotally mounted downward extension, hy'- draulic means for raising and lowering said downward extension, hydraulic means for raising and lowering said truck body, a duid pump for supplying iiud un'der pressure for both said hydraulic means, power take oil means for supplying power for operating said pump and for operating said endless conveyor, gear sh'ift means cooperating with said powertake ofi means for automatically disconnecting the-supply of power to the endless conveyor when the body is raised. 18. In an automotive truck of the character described, in combination, a truck body, an endless conveyorcomprising a pair of side chains, carried by said truck body, a pair of laterally and oppositely disposed drive wheels for driving, respectively, the side chains of the conveyor, the space between said" drive wheels being unobstructed by a transversely extending shaft, and means for applying power to said drive wheels.

19. In an automotive truck of the character described, in combination, a truck body, an endless conveyor, comprising a pair of side chains, carrled'bysaidtruckbodmapairoi laterally and oppositely disposed drive wheels for driving. respectively, the side chains of the conveyor, the

Yspace between said drive wheels being unob-v structed by a transversely 'extending shaft, and

a common means for applying power simultane- 'ously to said drive wheels.

.andoppositelydisposeddrlvewheelsfordrlvlng .erativelyoonnectingsaiddrivewheelswlthsaid andloweringsaidtruckbody,afluidpumpfor -h supplyingnuiriunderpres'sureforbotlis'aidhy-` drsulic mesnapower take oi! means for supplyrespectlvelnthesideehalmoftheconveyontbe spacebetweensaiddrivewheelsbeing-unob-- structed by a transversely extendinsshafta downwardlyextendingdrlveshattandmeansop.-

downwardly extending drive shaft.

21.1n an automotlvetrnckof the characterl described. in combination, a truck body pivoted for dumping. an endless conveyor, comprising a pairofsldechainacarriedbytheuppenrear' part of said truck'body, a pair of laterally and oppositely disposed drive wheels. for driving.

in gpowerforopex'ai:iugssidpumpandfororlel'- 'Il mpeotlvelmtholide oonveyoatho aecomo space between said drive wheels being unobstructed by a transversely extending shaft, and means, including a clutch disconnectible when the bodyisraised for dumping, forv applying power simultaneously to said drive wheels.

22'. In an automotive truck of the character described, in combination, a truck body, an endcarried by said truck body, a pair of laterally and oppositely disposed drive wheels for driving, respectively, the side chains 'of the conveyor, the space between said drive wheels being unobstructed by a transversely extending shaft, means for resiliently mounting said drive wheels for causing them to exert tension on said side chains, and means for applying power to` said drive wheels.

23. In an automotive truck of the character described, in combination, a truck body, an endless conveyor, comprising a pair of side chains, carried by said truck body, a pair of laterally and oppositely disposed drive wheels for driving, respectively, the side chains oi' the conveyor, .the space betweenv said drive wheels being unobstructed by a-transversely extending shaft, means for resiliently mounting said drive wheels for causing them to exert tension on said side chains, a downwardly extending drive shaft, and means operatively connecting said drive wheels with said downwardly extending drive shaft.

24. In an automotive truck of the character described, in combination, a truck body pivoted less conveyor, comprising a pair of side chains,

less conveyor.

for dumping, an endless conveyor. comprising a pair of side chains, carried by the'upper, rear part of said truck body, a pair of laterally and oppositely disposed drive wheels, for driving, respectively, the side chains of the conveyor, the space between said drive wheels being unobstructed by a transversely extending shaft, means for resiliently .mounting said drive wheels for causing them to exert tension on said side chains, and means, including a clutch disconnectible when the body is raised for dumping, for applying power simultaneously to said drive wheels.

25. In, an automotive truck of the character described, the combination of a tiltable .truck body, ian endless conveyor comprising a portion in the upper part of the truck body, and a second portion extending downwardly and outwardly. said second portion of the conveyor, mounted for pivotal movement with respect to the first portion, resilient means cooperating with the front end of the conveyor for keeping it taut and for absorbing shocks, means for driving the conveyor, power driven hydraulic means for raising and lowering said truck body, Iand means for raising and lowering the downward extension of the end- LORON G. KURTZ.

CARL C. OTICSON.

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